JP5401888B2 - Single base propellant - Google Patents

Description

  The present invention relates to a single-base propellant used for ammunition used in, for example, large-caliber tank guns, field guns, and the like. More specifically, the present invention relates to a single-base propellant that has excellent mechanical properties, stability over time, and flammability, and good manufacturability.

  In the field of propellants, single-base propellants mainly composed of nitrocellulose are widely used as ammunition for large-caliber tank guns, field guns, and the like. However, many single-base propellants are not preferred compositions because they contain dinitrotoluene, which can be harmful to carcinogenicity and the environment. Dinitrotoluene is a substance that falls under the first-class designated chemical substances stipulated in the PRTR [Pollutant Release and Transfer Register] law. In recent years, therefore, development of a single-base propellant that does not use dinitrotoluene has been promoted and proposed.

That is, a plasticizer suitable for a single base propellant that does not contain dinitrotoluene (DNT) has been disclosed (see, for example, Patent Document 1). This plasticizer is a compound selected from a citric acid compound and an adipic acid compound. Specifically, the single base propellant is composed of 88.0% by mass of nitrocellulose, 10.0% by mass of acetyltriethyl citrate, 1.0% by mass of 3-diethyl-1,3-diphenylurea (EC), and potassium nitrate 1 0.0 mass% (Example 5 on page 16 of Patent Document 1).
International Publication No. WO 99/59939 (Pages 1, 16, and 20)

  Since the single base propellant described in Patent Document 1 does not use dinitrotoluene, it is a composition friendly to the human body and the environment. However, since the content of the plasticizer acetyltriethylcitric acid is an excess of 10% by mass (11.4 parts by mass with respect to 100 parts by mass of nitrocellulose), the single base propellant is It has become clear that manufacturability, mechanical properties, stability over time or flammability are reduced compared to single-base propellants, and in particular, manufacturability and flammability are problematic. Moreover, the single base propellant contains a small amount of 1.0 mass% (1.1 parts by mass with respect to 100 parts by mass of nitrocellulose) of 3-diethyl-1,3-diphenylurea, which is a aging stabilizer. Therefore, there is a problem that the stability with time of the single base propellant is not sufficiently exhibited.

  Accordingly, an object of the present invention is to provide a single-base propellant which is a composition friendly to the human body and the environment, is excellent in mechanical properties, stability over time, and flammability, and has good manufacturability. is there.

The single-base propellant of the first invention in the present invention contains component (a) nitrocellulose, component (b) acetylcitrate derivative and component (c) aging stabilizer, and component (b) acetylcitrate derivative Content is 6.5-9 mass parts with respect to 100 mass parts of component (a) nitrocellulose, and content of component (c) aging stabilizer is 1 with respect to 100 mass parts of component (a) nitrocellulose. .5～3.5 parts by der is, the component (c) aging stabilizer, characterized in diphenyl urea derivative der Rukoto.

  The single base propellant of the second invention is characterized in that, in the first invention, the component (b) acetylcitrate derivative is tributylacetylcitrate or trihexylacetylcitrate.

The single base propellant of the third invention is characterized in that, in the first invention, the diphenylurea derivative is methyldiphenylurea or dimethyldiphenylurea.

According to the present invention, the following effects can be exhibited.
The single base propellant of the first invention contains component (a) nitrocellulose, component (b) acetylcitrate derivative and component (c) aging stabilizer. And content of a component (b) acetylcitrate derivative is restrict | limited to 6.5-9 mass parts with respect to 100 mass parts of component (a) nitrocellulose. For this reason, it is possible to prevent adverse effects caused by an excessive amount of acetylcitric acid derivative as in the prior art, and to improve the mechanical characteristics, aging stability, combustibility and manufacturability of the single base propellant. Furthermore, content of a component (c) time-dependent stabilizer is set to 1.5-3.5 mass parts with respect to 100 mass parts of component (a) nitrocellulose. Therefore, the temporal stability of the single base propellant can be enhanced based on the temporal stabilizer. In addition, the component (c) aging stabilizer is a diphenylurea derivative. Therefore, the aging stability of the single base propellant can be further enhanced by a suitable diphenylurea derivative of the aging stabilizer.

Accordingly, the single-base propellant is a composition that is friendly to human bodies and the environment, and is excellent in mechanical properties, stability over time, and flammability, and can improve manufacturability.
In the single base propellant of the second invention, the component (b) acetyl citrate derivative is tributyl acetyl citrate or trihexyl acetyl citrate. For this reason, the effect of the first invention can be further improved by a suitable acetylcitric acid derivative.

In the single base propellant of the third invention, the diphenylurea derivative is methyldiphenylurea or dimethyldiphenylurea. Therefore, in addition to the effects of the first invention, the time-dependent stability of the single base propellant can be further enhanced by a suitable methyldiphenylurea or dimethyldiphenylurea among the diphenylurea derivatives.

Hereinafter, embodiments that are considered to be the best modes of the present invention will be described in detail.
The single base propellant of this embodiment contains component (a) nitrocellulose, component (b) acetylcitrate derivative and component (c) aging stabilizer. And the content of component (b) acetylcitric acid derivative is 6.5-9 parts by mass with respect to 100 parts by mass of component (a) nitrocellulose, and the content of component (c) aging stabilizer is component (a) It is set to 1.5 to 3.5 parts by mass with respect to 100 parts by mass of nitrocellulose. Such a single base propellant is not based on dinitrotoluene and thus is a human and environmentally friendly composition, and has excellent mechanical properties, stability over time, flammability and manufacturability. Below, the structure of this single base propellant is demonstrated in order.
[Component (a) Nitrocellulose]
The component (a), nitrocellulose (nitrified cotton), is a component that functions as a binder (binder) for granulating (graining) the fuel and molded product. The nitrocellulose is a nitrate obtained by treating cellulose with a mixed acid of nitric acid and sulfuric acid.

  Nitrate can be nitrated at three locations per unit molecule of glucose constituting nitrocellulose, but nitrified to various degrees is obtained, and the degree is distinguished by the nitrogen content. The amount of nitrogen in the nitrocellulose is preferably 11.7 to 13.4% by mass, more preferably 12.2 to 13.4% by mass, and 12.9 to 13.2% by mass. It is particularly preferred. When the amount of nitrogen is less than 11.7% by mass, the combustibility of the single base propellant tends to decrease, and nitrocellulose tends to be difficult to be formed into granules because it is too soluble in organic solvents. is there. On the other hand, if the amount of nitrogen exceeds 13.4% by mass, the stability with time of the single-base propellant is lowered, and at the same time, nitrocellulose is difficult to dissolve in an organic solvent, making it difficult to form into a granular form. Show the trend.

The component (a) nitrocellulose in the single base propellant is the main component, and its specific content is 88 to 93% by mass, preferably 90 to 91% by mass. When the content of nitrocellulose is less than 88% by mass, the function of the single base propellant as a fuel is lowered, and it becomes difficult to mold a molded product of the single base propellant. On the other hand, when it exceeds 93% by mass, the content of the component (b) acetylcitrate derivative and the component (c) aging stabilizer is relatively lowered, and the mechanical properties and aging stability of the single base propellant are deteriorated. .
[Component (b) Acetylcitric acid derivative]
The acetylcitric acid derivative of component (b) can be expressed as a plasticizer (gliding agent) so that the composition has sufficient plasticity when contained in a single base propellant, and is flexible. You can get a single base propellant with Therefore, the single base propellant has improved mechanical properties and can maintain the shape of the molded article even when subjected to a strong impact.

  As the component (b) acetylcitric acid derivative, any compound capable of plasticizing the component (a) nitrocellulose which is a binder component can be used. Examples of acetyl citrate derivatives include trimethyl acetyl citrate, triethyl acetyl citrate, tripropyl acetyl citrate, tributyl acetyl citrate, trihexyl acetyl citrate, triheptyl acetyl citrate, trioctyl acetyl citrate, trilauryl acetyl citrate, acetyl citrate Dimethyl monobutyl acrylate, dimethyl monohexyl citrate, dimethyl monooctyl acetyl citrate, dimethyl monolauryl acetyl citrate, dimethyl monohexadecyl acetyl citrate, dimethyl monooctadecyl acetyl citrate, diethyl monopropyl acetyl citrate, acetyl citrate Diethyl monobutyl acid, diethyl acetyl citrate monohexyl, diethyl mono-octyl acetyl citrate, acetyl que Diethyl monolauryl acetate, dipropyl monobutyl acetyl citrate, monomethyl diethyl acetyl citrate, monomethyl monoethyl monohexyl acetyl citrate, monomethyl dibutyl acetyl citrate, monoethyl monobutyl monolauryl acetyl citrate, monoethyl diacetyl citrate Examples include lauryl. These compounds are used alone or as a mixture of two or more.

  Among these compounds, tributyl acetyl citrate, trihexyl acetyl citrate or triheptyl acetyl citrate is preferable, particularly from the viewpoint of moldability of single-base propellant, stability at high temperature, etc., and tributyl acetyl citrate or acetyl citrate Trihexyl is particularly preferred.

Content of an acetyl citrate derivative is 6.5-9 mass parts with respect to 100 mass parts of component (a) nitrocellulose, Preferably it is 7.5-8 mass parts. When the content of the acetylcitric acid derivative is less than 6.5 parts by mass, the effect as a plasticizer is poor, so the manufacturability of the single base propellant is deteriorated, and the mechanical properties of the single base propellant are low. Run short. On the other hand, when the content of the acetylcitric acid derivative exceeds 9 parts by mass, the effect as a plasticizer becomes great, but the combustibility of the single-base propellant is deteriorated and there is a problem in manufacturability. .
[Component (c) Aging stabilizer]
This component (c) aging stabilizer expresses the function of improving the aging stability of the single base propellant. A typical diphenylurea derivative as the aging stabilizer can also exhibit a function as a plasticizer.

Aging stabilizers include compounds capable of improving the temporal stability of the single base propellant. Examples of the aging stabilizer include diphenylurea such as diphenylurea, methyldiphenylurea, ethyldiphenylurea, diethyldiphenylurea, dimethyldiphenylurea, and methylethyldiphenylurea, diphenylamine derivatives such as diphenylamine and 2-nitrodiphenylamine, and ethylphenylurethane. And phenylurethane derivatives such as methylphenylurethane, diphenylurethane derivatives such as diphenylurethane, and resorcinol. Among these, diphenylurea derivatives are used. These compounds are used alone or as a mixture of two or more.

  Among these compounds, since the melting point is 120 ° C. or higher, a diphenylurea derivative having a high effect of reliably capturing nitrogen oxides generated from nitrocellulose even at high temperatures, and suppressing the natural decomposition of nitrocellulose, Specifically, methyl diphenyl urea, diphenyl urea or dimethyl diphenyl urea is preferable, and methyl diphenyl urea or dimethyl diphenyl urea is particularly preferable.

The content of the aging stabilizer is 1.5 to 3.5 parts by mass, preferably 2 to 3 parts by mass with respect to 100 parts by mass of the component (a) nitrocellulose. When the content of the aging stabilizer is less than 1.5 parts by mass, the effect of increasing the aging stability of the single base propellant is insufficient. On the other hand, when it exceeds 3.5 parts by mass, the effect of improving the temporal stability of the single base propellant is great, but on the other hand, the combustibility of the single base propellant is deteriorated.
[Other ingredients]
In addition to the component (a) nitrocellulose, component (b) acetylcitrate derivative and component (c) aging stabilizer, the component (d) brightener or component (e) anti-inflammatory agent should be used for the single base propellant. You can also. By coating component (d) brightener on the surface of a single base propellant, it is possible to impart gloss, and for example, graphite as a brightener has electrical conductivity, thus preventing charging of the single base propellant. be able to. In addition, since the sliding of the molded article is improved, the loadability of the single base propellant can be improved and moisture absorption can be suppressed. Examples of the brightener include graphite. The content of the brightener is usually 0.03 to 0.35 parts by mass with respect to 100 parts by mass of component (a) nitrocellulose.

Next, when the component (e) anti-inflammatory agent is blended with a single base propellant, the flame generated when the single base propellant burns can be suppressed. Examples of the flame retardant include potassium nitrate, barium nitrate, potassium sulfate or a mixture thereof. The content of the anti-inflammatory agent is usually 0.5 to 2.5 parts by mass with respect to 100 parts by mass of component (a) nitrocellulose.
[Single base propellant]
The single base propellant is used as a molded product formed into a desired shape using a molding apparatus such as an extrusion molding apparatus. Examples of the shape of the molded product include a non-porous columnar shape, a single-hole columnar shape, a porous columnar shape, and a porous hexagonal columnar shape. These single base propellant moldings are prepared by, for example, adding an organic solvent, preferably a mixed solution of acetone and ethyl alcohol or a mixed solution of diethyl ether and ethyl alcohol, to the single base propellant and extruding it with an extrusion molding apparatus. It can be manufactured by a molding method.

The obtained single-base propellant or its molded product is used for ammunition used for large-caliber tank guns, field guns, etc., as well as an ignition agent for transferring the energy of the fire tube to the single-base propellant or its molded product. Also used as
[Summary of actions and effects exhibited by the embodiment]
-The single base propellant in this embodiment contains a component (a) nitrocellulose, a component (b) acetylcitrate derivative, and a component (c) aging stabilizer. And content of a component (b) acetylcitrate derivative is restrict | limited to 6.5-9 mass parts with respect to 100 mass parts of component (a) nitrocellulose. For this reason, it is possible to prevent adverse effects caused by an excessive amount of acetylcitric acid derivative as in the prior art, and to improve the mechanical characteristics, aging stability, combustibility and manufacturability of the single base propellant. Furthermore, content of a component (c) time-dependent stabilizer is set to 1.5-3.5 mass parts with respect to 100 mass parts of component (a) nitrocellulose. Therefore, the temporal stability of the single base propellant can be improved based on such a temporal stabilizer.

  Accordingly, since the single base propellant does not contain dinitrotoluene, it is a composition friendly to the human body and the environment, and is excellent in mechanical properties, stability over time and flammability, and has good manufacturability.

  The component (b) acetylcitric acid derivative is tributyl acetylcitrate or trihexyl acetylcitrate, whereby the effect of the single base propellant can be further improved based on a compound suitable as a plasticizer.

  -When the said component (c) aging stabilizer is a diphenyl urea derivative, the aging stability of a single base propellant can further be improved based on a suitable diphenyl urea derivative among the aging stabilizers.

  -When the diphenylurea derivative is methyldiphenylurea or dimethyldiphenylurea, it is possible to further improve the temporal stability of the single base propellant based on the preferred methyldiphenylurea or dimethyldiphenylurea among the diphenylurea derivatives.

Hereinafter, although the said embodiment is described further more concretely by giving an Example and a comparative example, this invention is not limited to the range of these Examples. The method for evaluating the characteristics of the single base propellant in the examples and comparative examples is shown below.
(Evaluation method of mechanical properties)
First, a compressive strength test method for evaluating mechanical properties will be described. The compressive strength test was performed using a tensile compression tester manufactured by Minebea Co., Ltd. A sample of a single base propellant as a sample was placed on the center of the sample stage, and then compressed in the length direction at a speed of 30 mm / min. Then, the maximum load value was read from the stress strain curve, and the mechanical characteristics were evaluated. When shooting tank guns, field guns, etc., a large impact is given to the molding of the single base propellant. Therefore, the molded product of the single base propellant is required to be able to withstand the impact, and in the shape used in this test, it is desirable that the compressive strength is 70 MPa or more.
(Flammability evaluation method)
Next, a closed bomb combustion test for evaluating the flammability will be described.

  As shown in FIG. 1, a bomb body 1 is provided with a cylindrical combustion space 2 having a volume of 70 ml, and a single base propellant molding 3 in which a single base propellant is molded in the combustion space 2. Is loaded. On the base end side (left side in FIG. 1) of the bomb body 1, a plug body 4 for sealing after a single-base propellant molded product 3 is loaded in the combustion space 2 is attached and detachable by a bolt 5. ing. The volume of the combustion space 2 is calculated by subtracting the volume of a part of the plug body 4 from the volume of a cylindrical body having a diameter of 35 mm and a depth of 75 mm. A pair of electrodes 9, 10 are attached to the inner end face of the plug body 4, and an ignition ball (with black powder 0.5 g) 11 is attached to both electrodes 9, 10 via a connecting wire.

  The electrode 9 is connected to one electrode of an ignition device 7 located outside via a connection wiring 6, and the electrode 9 is connected to the bomb body 1. The other electrode of the ignition device 7 is connected to the bomb main body 1 through the connection wiring 8. Then, by operating the ignition device 7, the ignition ball 11 is ignited through the connection wires 6, 8, the electrodes 9, 10, etc., and the single base propellant molding 3 in the combustion space 2 is ignited and burned. It has become.

  A gas vent valve 12 is attached to the side of the bomb body 1 and communicates with the combustion space 2 via a sampling pipe 13. The gas in the combustion space 2 is sampled from the degassing valve 12 and its combustion characteristics can be evaluated. A pressure transducer 14 is attached to the tip of the bomb body 1 and communicates with the combustion space 2 via a communication pipe 15. The pressure converter 14 can determine the arrival time from the start of energization to the maximum pressure.

Then, the molded product 3 of the single base propellant is loaded into the combustion space 2 with the plug 4 removed. The amount of drug to be loaded at that time was set so that the loading specific gravity was 0.1 g / ml. Next, after closing the plug 4, the single base propellant molding 3 in the combustion space 2 is ignited by the ignition device 7. Then, the relationship between the combustion time and the combustion pressure at the time of combustion is measured by an oscilloscope (not shown) via the pressure converter 14, and the arrival time from the start of energization to the maximum pressure (combustion completion) Time). The molded product 3 of the single base propellant needs to be burned at an appropriate speed, and in the shape used in this test, it is desirable to complete the burning in 18 to 26 ms (milliseconds).
(Evaluation method of stability over time)
Next, a heat test for evaluating the temporal stability will be described.

After putting the weighed single base propellant molding into the sample bottle, the sample bottle was placed in a thermostatic chamber adjusted to 75 ° C. and allowed to stand for 240 hours. Thereafter, the molded product of the single base propellant was taken out from the thermostatic chamber, and a heat resistance test (JIS K 4810) was performed to confirm the temporal stability of the single base propellant. Single-base propellants must be able to be used without problems even when stored for a long period of time, and it is desirable that the test results be 18 minutes or longer under the present test conditions.
(Manufacturing evaluation method)
Next, a method for evaluating productivity will be described. The following evaluation criteria evaluated the ease of shaping | molding when the single base propellant of each Example and a comparative example is extrusion-molded with an extrusion molding apparatus, and the handleability at the time of conveying to a cutting machine.

  ○: When handling the extruding agent extruded from the extrusion device, the extruding agent could be easily handled. Δ: The extruding agent was not flexible enough to handle with care. X: There was a problem in handling because the extrudate was not flexible and very brittle.

In addition, the symbol in Table 1 and Table 2 represents the following meaning.
NC: Nitrocellulose ATBC: Tributyl acetylcitrate ATEC: Triethyl acetylcitrate ATHC: Trihexyl acetylcitrate DIBA: Diisobutyl adipate AKII: Methyldiphenylurea SEII: Dimethyldiphenylurea SEI: Diethyldiphenylurea G.P .: Graphite KN: Potassium nitrate (Example 1)
100 parts by mass of nitrocellulose with 13.2% by mass of nitrogen, 7.7 parts by mass of tributyl acetyl citrate as a plasticizer, and 2.2 parts by mass of methyldiphenylurea as a aging stabilizer Then, a mixed solution of 60 parts by mass of diethyl ether and 40 parts by mass of ethyl alcohol was added and uniformly mixed with a so-called Werner mixer. The Werner-mixer is a device that stirs and mixes with stirring blades attached to a rotating shaft extending in the lateral direction.

  This mixture was then loaded into an extruder. The extrusion device is preinstalled with a 7.5 mm die and a 0.8 mm pin, and the single base propellant is extruded through this die by applying pressure, and has 7 holes with 7 through holes. Molded into a cylindrical shape. This molded product was cut into a length of 7.5 mm and dried to obtain a granular single-base propellant molded product. The manufacturability at that time was evaluated.

Further, using this single-base propellant molding, the combustion completion time was measured by the compressive strength test and the sealed bomb combustion test. Furthermore, the stability over time by the heat resistance test was also measured. The results are shown in Table 1.
(Examples 2 to 10)
A single base propellant was produced by the same method as in Example 1 with the composition shown in Table 1, and each characteristic was evaluated by the same method as in Example 1. The results are summarized in Table 1.

表１の試験結果より次のようなことがわかった。

From the test results in Table 1, the following was found.

It became clear that any single base propellant shown in Examples 1 to 10 has no problem in manufacturability. Moreover, as a result of the compressive strength test, it was confirmed that all had a compressive strength of 72 MPa or more and there was no problem in mechanical properties. Furthermore, the combustion completion time from the start of energization to the maximum pressure is also 20 to 24 ms, and it was confirmed that it can be sufficiently used as a single base propellant. In addition, even when looking at the results of the heat resistance test, all of them were 20 minutes or longer, and it was confirmed that the stability over time was excellent.
(Comparative Examples 1-6)
With the composition shown in Table 2, each single-base propellant was produced by the same method as in Example 1, and each characteristic was evaluated by the same method as in Example 1. The results are shown in Table 2.

表２に示したように、可塑剤としてアジピン酸ジイソブチル（ＤＩＢＡ）を使用した比較例１では、燃焼完了時間及び耐熱試験については問題ないものの、製造性に問題が生じ、かつ圧縮強度が不足する結果となった。すなわち、圧縮強度試験において６３ＭＰａの力が加わるとシングルベース発射薬の成形物が破壊されることがわかり、シングルベース発射薬として使用することが困難であることが明らかとなった。

As shown in Table 2, in Comparative Example 1 using diisobutyl adipate (DIBA) as a plasticizer, there are no problems with the combustion completion time and the heat resistance test, but there is a problem in manufacturability and the compressive strength is insufficient. As a result. That is, when a force of 63 MPa was applied in the compressive strength test, it was found that the molded product of the single base propellant was destroyed, and it became clear that it was difficult to use as a single base propellant.

  Further, in Comparative Example 2 in which the content of tributyl acetol citrate (ATBC), which is a plasticizer, was excessive, there was no problem with the compressive strength and the heat resistance test, but the content of nitrocellulose was relatively reduced, so the productivity There was a problem. In addition, it has been found that the combustion completion time from the start of energization to the maximum pressure is as slow as 30 ms, causing problems in combustibility and ignitability. In Comparative Example 3 in which the content of tributyl acetyl citrate was excessively small, there was no problem with the combustion completion time and the heat resistance test, but the effect as a plasticizer was poor, resulting in problems in manufacturability and poor compressive strength. I found out that

  In Comparative Example 4 in which the content of methyldiphenylurea (AKII), which is a aging stabilizer, is excessively small, there is no problem with manufacturability, mechanical properties, and combustion completion time, but the effect as aging stability is poor. It was found that there was a problem with the heat test. In Comparative Example 5 in which the content of methyldiphenylurea was excessive, there was no problem with manufacturability, mechanical properties, and stability over time, but since the content of nitrocellulose was relatively reduced, from the start of energization to the maximum pressure It was found that the combustion completion time was slowed down to 29 ms, causing problems in combustibility and ignitability.

  In addition, the single base propellant of Comparative Example 6 manufactured according to the composition of the single base propellant described in Patent Document 1 (Example 5 described in Patent Document 1) has no problem with mechanical properties. The content of triethyl acetyl citrate (ATEC) was high, and the content of nitrocellulose was relatively decreased accordingly. For this reason, there was a problem in manufacturability, and the result was that the combustion completion time was slightly delayed. In addition, since the content of diethyldiphenylurea as a aging stabilizer is a small amount of 1.1 parts by mass, the effect of aging stability is poor, and the heat resistance test resulted in a short time of 12 minutes.

It should be noted that the above embodiment can be modified as follows.
A plurality of nitrocelluloses having different amounts of nitrogen can be used as the component (a) nitrocellulose to adjust the combustibility, temporal stability or manufacturability of the single base propellant.

-Other plasticizers other than the said component (b) acetylcitrate derivative can also be used with an acetylcitrate derivative.
・ The single-base propellant can contain other components such as a combustion inhibitor that prevents a sudden increase in combustion pressure and a erosion inhibitor that extends the life of the gun barrel. Examples of the combustion inhibitor include camphor, dibutyl phthalate, and the like, and examples of the baking inhibitor include calcium pyroglutamate and sodium glutamate.

-It is also possible to use the single base propellant of the present invention as a propellant such as a rocket.
Furthermore, the technical idea grasped from the embodiment will be described below.

〇 wherein component (b) acetyl citrate derivatives, the single base propellant, wherein a plurality of types of compounds. When comprised in this way, in addition to the effect of the said invention, it can adjust so that the effect as a plasticizer may meet the objective.

〇 said components (c) diphenyl urea derivatives, the single base propellant, wherein a plurality of types of compounds. In such a configuration, in addition to the effect of the invention can be adjusted to suit the purpose of effect as aging stability and plasticizer.

O said single base propellant characterized in that it contains a brightener or anti-inflammatory agent. In such a structure, in addition to the effects of the invention, in addition antistatic gloss by brightener, it is possible to improve the like sliding property, the occurrence of the flame during the combustion of single base propellant by antiphlogistics Can be suppressed.

The schematic sectional drawing which shows the sealed bomb combustion apparatus for evaluating the combustibility in embodiment.

Explanation of symbols

  3 ... Molding of single base propellant.

Claims (3)

It contains component (a) nitrocellulose, component (b) acetylcitric acid derivative and component (c) aging stabilizer, and the content of component (b) acetylcitrate derivative is 100 parts by mass of component (a) nitrocellulose. 6.5 to 9 are parts by weight, and 1.5 to 3.5 parts by der content of the component (c) aging stabilizer of the component (a) nitrocellulose 100 parts by Te is,
Single base propellant the component (c) aging stabilizer, characterized in diphenyl urea derivative der Rukoto. The single-base propellant according to claim 1, wherein the component (b) acetylcitrate derivative is tributylacetylcitrate or trihexylacetylcitrate. The single-base propellant according to claim 1 , wherein the diphenylurea derivative is methyldiphenylurea or dimethyldiphenylurea.

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